package com.encryption.dao;

import java.util.List;

import org.hibernate.Criteria;
import org.hibernate.LockMode;
import org.hibernate.Query;
import org.hibernate.criterion.Example;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.encryption.model.Department;
 
/**
 * A data access object (DAO) providing persistence and search support for
 * Department entities. Transaction control of the save(), update() and delete()
 * operations can directly support Spring container-managed transactions or they
 * can be augmented to handle user-managed Spring transactions. Each of these
 * methods provides additional information for how to configure it for the
 * desired type of transaction control.
 * 
 * @see com.encryption.model.Department
 * @author MyEclipse Persistence Tools
 */

public class DepartmentDAO extends BaseHibernateDAO {
	private static final Logger log = LoggerFactory
			.getLogger(DepartmentDAO.class);
	// property constants
	public static final String NAME = "name";

	public void save(Department transientInstance) {
		log.debug("saving Department instance");
		try {
			getSession().save(transientInstance);
			log.debug("save successful");
		} catch (RuntimeException re) {
			log.error("save failed", re);
			throw re;
		}catch(Throwable te){
			log.error("save failed", te);
		}
	}

	public void delete(Department persistentInstance) {
		log.debug("deleting Department instance");
		try {
			getSession().delete(persistentInstance);
			getSession().flush();
			log.debug("delete successful");
		} catch (RuntimeException re) {
			log.error("delete failed", re);
			throw re;
		}
	}

	public Department findById(java.lang.Integer id) {
		log.debug("getting Department instance with id: " + id);
		try {
			Department instance = (Department) getSession().get(
					"com.encryption.model.Department", id);
			return instance;
		} catch (RuntimeException re) {
			log.error("get failed", re);
			throw re;
		}
	}

	public List findByExample(Department instance) {
		log.debug("finding Department instance by example");
		try {
			List results = getSession()
					.createCriteria("com.encryption.model.Department")
					.add(Example.create(instance)).list();
			log.debug("find by example successful, result size: "
					+ results.size());
			return results;
		} catch (RuntimeException re) {
			log.error("find by example failed", re);
			throw re;
		}
	}

	public List findByProperty(String propertyName, Object value) {
		log.debug("finding Department instance with property: " + propertyName
				+ ", value: " + value);
		try {
			String queryString = "from Department as model where model."
					+ propertyName + "= ?";
			Query queryObject = getSession().createQuery(queryString);
			queryObject.setParameter(0, value);
			return queryObject.list();
		} catch (RuntimeException re) {
			log.error("find by property name failed", re);
			throw re;
		}
	}

	public List findByName(Object name) {
		return findByProperty(NAME, name);
	}

	public List findAll() {
		log.debug("finding all Department instances");
		try {
			String queryString = "from Department";
			Query queryObject = getSession().createQuery(queryString);
			return queryObject.list();
		} catch (RuntimeException re) {
			log.error("find all failed", re);
			throw re;
		}
	}

	public Department merge(Department detachedInstance) {
		log.debug("merging Department instance");
		try {
			Department result = (Department) getSession().merge(
					detachedInstance);
			log.debug("merge successful");
			getSession().flush();
			return result;
		} catch (RuntimeException re) {
			log.error("merge failed", re);
			throw re;
		}
	}

	public void attachDirty(Department instance) {
		log.debug("attaching dirty Department instance");
		try {
			getSession().saveOrUpdate(instance);
			log.debug("attach successful");
		} catch (RuntimeException re) {
			log.error("attach failed", re);
			throw re;
		}
	}

	public void attachClean(Department instance) {
		log.debug("attaching clean Department instance");
		try {
			getSession().lock(instance, LockMode.NONE);
			log.debug("attach successful");
		} catch (RuntimeException re) {
			log.error("attach failed", re);
			throw re;
		}
	}
	/**
	 * 根据condition对部门表查询
	 * @param instance
	 * @return
	 */
	public List<Department> findByExample(List<Condition> conditions) {
		log.debug("finding Department instance by example");
		try {
			 
			Criteria criteria= getSession()
					.createCriteria(Department.class);
			//设置查询条件
			BaseHibernateDAO.addCriteria(conditions, criteria);
			
			List<Department> results = criteria.list();
			log.debug("find by example successful, result size: "
					+ results.size());
			return results;
		} catch (RuntimeException re) {
			log.error("find by example failed", re);
			throw re;
		}
	}
	/**
	 * 分页查询部门表
	 */
	public List<Department> findByExample4Page(List<Condition> conditions, int page, int pageSize) {
			log.debug("finding Department instance by example");
			try {
				Criteria criteria= getSession()
					.createCriteria(Department.class);
				//设置查询条件
				BaseHibernateDAO.addCriteria(conditions, criteria);
				criteria.setFirstResult(page);
				criteria.setFetchSize(pageSize);
				List<Department> results =criteria.list();
				
				log.debug("find by example successful, result size: "
						+ results.size());
				return results;
			} catch (RuntimeException re) {
				log.error("find by example failed", re);
				throw re;
			}
		}
	
	private static DepartmentDAO departmentDAO = null;
	
	
	public static  DepartmentDAO getDepartmentDAO(){
		if(null == departmentDAO) {
			departmentDAO = new DepartmentDAO();
		} 
		return departmentDAO;
	}
}